Another online way to assess what your house is worth

Do we really need another Zillow Zestimate-style online gizmo to tell us what a computer model says our homes are worth? Probably not.

So why would a well-known company venture out with a new version so late in the game? The popular mortgage site Lending Tree, which debuted its own valuation model in June, can tell you why: Because none of the other value estimators calculate your home equity or suggest how and when you might want to tap into it.